Form validation in javascript

In this article, we’ll explore how to validate common form fields such as email, phone number, and password using RegExp patterns.

1.

Validating an Email Address

One of the most common form fields to validate is the email address. We can use a RegExp pattern to ensure the email is in the correct format.

• ^[a-zA-Z0-9._%+-]+: Matches the local part (before the @) which can include letters, numbers, and certain special characters like ., %, +, -.
• @[a-zA-Z0-9.-]+: Matches the domain part (after the @), which can contain letters, numbers, hyphens, and periods.
• \.[a-zA-Z]{2,}$: Ensures the email ends with a valid top-level domain (e.g., .com, .org).

2.

Validating a Phone Number

Next, let’s validate a phone number.

Javascript form validation example

Phone number formats vary by region, but we’ll use a basic pattern to validate a typical 10-digit phone number.

^\d{10}$: Matches exactly 10 digits. The \d stands for a digit, and {10} ensures exactly 10 digits are present.

3.

Validating a Pas

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